
Florida is one of the most rapidly growing states in the nation and Highlands County's growth exceeds the state's. Between 1990 and 1999 the county's population experienced a growth rate of 17.5 percent. Between 2000 and 2007 the county's population experienced a growth rate of 11.5 percent.

| Year |
Avon Park |
Lake Placid |
Sebring |
Unincoporated |
Total |
| 1990 |
8,078 |
1,158 |
8,841 |
50,355 |
68,432 |
| 1996 |
8,110 |
1,427 |
8,955 |
59,504 |
77,996 |
| 2000 |
8.859 |
1,516 |
9,555 |
67,436 |
87,366 |
| 2001* |
8,540 |
1,661 |
9,723 |
68,264 |
88,188 |
| 2006* |
8,792 |
1,762 |
10,218 |
75,900 |
96,672 |
| * Florida Statistical Abstract 2007, UF, BEBR |
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